package httpclient

// http-client

import (
    "io/ioutil"
    "net/http"
    "time"
    "fmt"
    "bytes"
)

type ResponseWrapper struct  {
    StatusCode int
    Body string
    Header http.Header
}

func Get(url string, timeout int) ResponseWrapper {
    req, err := http.NewRequest("GET", url, nil)
    if err != nil {
        return createRequestError(err)
    }

    return request(req, timeout)
}

func PostParams(url string,params string, timeout int) ResponseWrapper {
    buf := bytes.NewBufferString(params)
    req, err := http.NewRequest("POST", url, buf)
    if err != nil {
        return createRequestError(err)
    }
    req.Header.Set("Content-type", "application/x-www-form-urlencoded")

    return request(req, timeout)
}

func PostJson(url string, body string, timeout int) ResponseWrapper {
    buf := bytes.NewBufferString(body)
    req, err := http.NewRequest("POST", url, buf)
    if err != nil {
        return createRequestError(err)
    }
    req.Header.Set("Content-type", "application/json")

    return request(req, timeout)
}

func request(req *http.Request, timeout int) ResponseWrapper {
    wrapper := ResponseWrapper{StatusCode: 0, Body: "", Header: make(http.Header)}
    client := &http.Client{}
    if timeout > 0 {
        client.Timeout = time.Duration(timeout) * time.Second
    }
    setRequestHeader(req)
    resp, err := client.Do(req)
    if err != nil {
        wrapper.Body = fmt.Sprintf("执行HTTP请求错误-%s", err.Error())
        return wrapper
    }
    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        wrapper.Body = fmt.Sprintf("读取HTTP请求返回值失败-%s", err.Error())
        return wrapper
    }
    wrapper.StatusCode = resp.StatusCode
    wrapper.Body = string(body)
    wrapper.Header = resp.Header

    return wrapper
}

func setRequestHeader(req *http.Request)  {
    req.Header.Set("Accept-Language", "zh-CN,zh;q=0.8,en;q=0.6")
    req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36 golang/gocron")
}

func createRequestError(err error) ResponseWrapper {
    errorMessage := fmt.Sprintf("创建HTTP请求错误-%s", err.Error())
    return ResponseWrapper{0, errorMessage, make(http.Header)}
}